ZAGG InvisibleShield Screen Protector for Nokia Lumia 800 Military-Grade - Designed to protect military helicopter blades from scratches and nicks, this powerful film has been redeveloped to provide ultimate protection for your device Nano-Memory Technology - Engineered with ZAGG's exclusive Nano-Memory Technology your invisibleSHIELD provides maximum damage resistance, self-healing properties, and flexibility. Lifetime Warranty - If your invisibleSHIELD is ever damaged, ZAGG will replace it for free, for the life of your device!